Raimey,
If you are asking about the 8x48R S&S, my choice would be the 30-30, which I use to form its little sister the 6.5x48 R S&S. The lengths are very close. The 30-30 head size is a good bit smaller than the 8x48R S&S (and the 6.5x48R as well). I haven't had a problem with the smaller head diameter. If it bothers you, you can use 9.3x72R norm. which has head diameter of about .427" vs .422" for 30-30 vs .433" for 8x48R. We both have 30-30 and 9.3x72R, but I don't like to waste 9.3's by trimming that much when I have a "pile" of 30-30's. If you don't mind searching and buying new cases, you might try .303 Savage which is about .433 at the base but is shorter than 30-30. ( I don't know if it is enough shorter that you wouldn't have to trim it. If I also had a pile of them, I would use them but wouldn't buy new ones. BTY, the rims of 30-30 and likely 303 Savage need to be thinned but not likely the 9.3x72R. If the rifle happens to be 8x58R S&S, your choices would be 38-55 (original length [2.125-2.130"], which is a little shorter than 58mm and the rim needs trimming) or 9.3x72R.\
Mike
